May 19, 1916.

THE COLLIERY GUARDIAN.

939

PLEXSIM ELECTRIC STILL

This Still is a compact and simple
apparatus for providing distilled water
for batteries of Miners’ Electric Lamps.
It is made in heavy gauge copper,
and is of robust construction.

The action is simple and automatic.
Absolutely no attention is required.

All parts, including the heating
elements, are easily accessible.

Send for descriptive leaflet No. G 622.

Simplex Conduits Limited,

Manufacturing Electrical Engineers,

GARRISON LANE, BIRMINGHAM.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COAL SCREENING & CONVEYING

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T A

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.



CONSIDERABLY OVER

inn pi ant2 b-"=»n

I IIII J I Hll I Ll AND THE COLONIES

Estimates and Designs on application.

Agent for South Wales: A. LEIGHTON STEVENS, 15, Fields Roa , Newport, Mon.

Walter Scott Ltd.

Leeds,	LEEDS STEEL WORKS,	England

PATENT

“MAC” VALVE.

MANUFACTURERS OF

BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS,
TRAMRAILS AND PERMANENT WAY RAILS, &o.

Example of 10 in. x 6 in. 42 lb. R.S. Joists carved for Framework to Roadway.

/ <$■
f <»

® \ Jr

Pit Head Frame.

, Erected in Works
for inspection.

ROLLED STEEL JOISTS for PIT PROPS,
FRAMEWORK TO ROADWAYS. &o.

STRUCTURAL STEELWORK FOR BUILDINGS, Ac.

Mild Steel Blooms. Billets, Slabs, Tinbars, Rounds & Flats.

Rolls cut for Special Sections and to approved quantities
Books of Sections and other information on application.

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Figure 8200—Inside Scx?ew
Figure 8205—Outside Screw

Suitable for the
Highest Steam Pressures.

Fitted with
Hopkinson’sPlatnam ”
Metal Renewable Valve
and Seat.

All parts interchangeable.

All joints made by metallic
contact, thereby obviating the
necessity of using jointing
material.

By removing the cover the seat
and valve are withdrawn,
enabling new parts to be in-
serted in about a minute’s
time, and without the neces-
sity—as with ordinary valves
—of removing the valve body
from its fixed position.

The Renewable Valve and Seat is made of

Hopkinson’s “ Platnam ” Metal

which is suitable for superheated steam and bad waters.

There are many valves with renewable valve and seat upon the market, but under modern
conditions and high pressures do not last any length of time owing to the deterioration which
takes place on the valve and seat, and consequently the renewing of the parts is a frequent
occurrence. We have tried our “ Platnam ” Meta'l under severe conditions, and have every
confidence in recommending it to work under high temperatures. The “ MAC ” valve has
been designed to adopt this metal for the renewable valve and seat.

Upwards of 500 tons of Standard Steel Castings kept in stock.

'We can give immediate delivery of iron and steel Valves.

Illustrated Catalogue Post Free on Application.

J. HOPKINSON & C° LD Huddersfield,

Makers of Patent Safety Boiler Mountings and Valves

For High Pressure Superheated Steam, High-class Exhaust and Water Sluice

Valves for Condensing Plants, &c., Automatic Exhaust Valves, Reducing

Valves, Steam Traps, &c., &c.

Depots & Showrooms—London, Glasgow, Edinburgh, Cardiff,
Oldham, Blackpool, Paris & Petrograd.

No. 342.__________________